/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * This file may have been modified by Bytedance Inc.
 */

package com.bytedance.primus.common.event;


/**
 * Parent class of all the events. All events extend this class.
 */
public abstract class AbstractEvent<TYPE extends Enum<TYPE>>
    implements Event<TYPE> {

  private final TYPE type;
  private final long timestamp;

  // use this if you DON'T care about the timestamp
  public AbstractEvent(TYPE type) {
    this.type = type;
    // We're not generating a real timestamp here.  It's too expensive.
    timestamp = -1L;
  }

  // use this if you care about the timestamp
  public AbstractEvent(TYPE type, long timestamp) {
    this.type = type;
    this.timestamp = timestamp;
  }

  @Override
  public long getTimestamp() {
    return timestamp;
  }

  @Override
  public TYPE getType() {
    return type;
  }

  @Override
  public String toString() {
    return "EventType: " + getType();
  }
}
